无人机制造商表示，无人机是令人兴奋的新技术，未来将由无人机控制。
Drone makers say drones are exciting new technology and that the future will be controlled by them.
然而，令人兴奋的是，民众讨论依然是为未来获取更多智慧的最可靠的机制。
Vigorous, unfettered, yet civil debate remains the most reliable mechanism for acquiring greater wisdom for the future.
很多年来，科学家们认为大脑的视交叉上核(scn)是生物钟中枢，具体机制是此处的神经元白天比夜间更兴奋。
For years, scientists thought that neurons in the brain's suprachiasmatic nuclei, or SCN, regulated our body clocks by firing a lot during the day and less at night.
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